Greater London · England
Sand mastic for sash & case windows in Cranbrook, Greater London
Professional sand mastic in and around Cranbrook, with old sealant always removed completely and a one-year guarantee.
- Old cement repairs round a window that have failed
- Gaps where the frame meets the masonry
- Cracked mastic round a front door frame
Aftercare tips
To keep the joints looking good and working properly:
- Find out about consent before window work on a listed home
- Have rotten timber repaired before new mastic goes in
- Clear gutters so water does not pour onto the windows
- Avoid heavy scraping on the mastic joint
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber, which can lead to rot.
About our sand mastic in Cranbrook
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you have gaps round a timber door in stone or brick and weathered mastic on the most exposed windows, we can put it right, whatever the surface.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
A 12-month guarantee comes as standard.
- Place
- Cranbrook (IG1, IG2, E12)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need sand mastic in Cranbrook
Water gets into small cracks in the mastic and loosens it further. Exposed elevations generally fail first.
If you can see any of these, it’s time to have the joints looked at:
- Draughts and rain around sash boxes
- Crumbling sand mastic round a window
- Tired mastic found when preparing windows for paint
- Gaps between timber frames and stone or brick
Managing a site like The Ursuline Academy Ilford? Then the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before booking
- Which colour the sealant will be
- Whether they’re fully insured
- How hidden problems are handled
- How long the guarantee is
How the job changes by surface
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Stone surrounds
Old stone surrounds are often uneven, so the joint varies in width. Sand mastic is shaped by hand to suit.
Cranbrook: your questions answered
Can you help a landlord with a rental near Ilford station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover Cranbrook for sand mastic?
Yes. Our work covers London and the South East, and Cranbrook is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
How long does sand mastic take?
Most jobs take anything from a few hours to a full day, depending on how many windows. Your quote will say how long we expect yours to take.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
What information do you need?
Tell us what needs doing and where, plus pictures if you have them. We’ll ask anything else we need to know.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Why it’s worth doing now in Cranbrook
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Call for a quick quote and we will explain what it covers.
Why us?
- Approved under the ARBOMaster scheme
- Experience in homes, commercial sites and hotels
- Tidy, careful work
- More than 20 years in sealant work
Nearby places to Cranbrook
Other services in Cranbrook
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Sashes that rattle, stick or won’t open
- Planning or listed building consent (your local planning authority decides)
- Putty and glazing repairs
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
Surfaces we seal
- Tenement windows
- Stone surrounds
- Brick reveals
- Sash and case windows
- Timber door frames
- Period & listed homes
How the visit works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. In a London area like Cranbrook, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
Getting a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we’ll take it from there.
Related advice
What affects the quote in Cranbrook
Call for a quick quote. What matters most is:
- When we can work, for business premises
- How easy the joints are to reach
- The type of sealant required
- How much old sealant there is and how hard it is to remove
What you pay reflects the work, not guesswork. That is why we ask a few questions first and agree the price before starting.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- Any access issues, like height or stairs
- If someone has resealed it before
- Pictures of the joints, sent by email
- The type of property
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.
Sand mastic in Cranbrook: local notes
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Cranbrook is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you let a flat or house near Ilford station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Cranbrook is about 2 miles north-east of Forest Gate, in Greater London. For sand mastic in and around Cranbrook, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Greater London. 764 places in Greater London are on our list, large and small. We also work in London, around 8 miles away.
Our applicators cover all of the IG1, IG2 and E12 postcode area for sand mastic and the streets around it. Sand mastic is available to properties on Mill Road, York Road and Prior Road. We also cover the places around Cranbrook: Ilford (1 mile south-east), Redbridge (1 mile north-west), Gants Hill (1 mile north-east), Little Ilford (1 mile south) and Manor Park (1 mile south). We also work in nearby towns such as London (8 miles south-west), City of Westminster (10 miles west), Marylebone (10 miles west), Kensington (12 miles west), St Pancras (8 miles west) and Shoreditch (7 miles south-west).
Near you in Cranbrook
Around Cranbrook, our work takes us to homes and buildings near Highlands Primary School, Great Spoon of Ilford pub and Valentines Park and the streets around them. Cranbrook’s nearest station is Ilford station, roughly 0.5 miles south-east of the centre. Well-known places in the area include Redbridge Museum (0.7 miles south-east) and Wanstead Hospital (2.1 miles north-west). For a walk, there’s Ripple Nature Reserve and Hollow Pond.